/*
Copyright (C) 1997-2001 Id Software, Inc.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
==============================================================================

hover

==============================================================================
*/

#include "g_local.h"
#include "m_hover.h"

bool visible(edict_t *self, edict_t *other);

static int  sound_pain1;
static int  sound_pain2;
static int  sound_death1;
static int  sound_death2;
static int  sound_sight;
static int  sound_search1;
static int  sound_search2;

void hover_sight(edict_t *self, edict_t *other)
{
    gi.sound(self, CHAN_VOICE, sound_sight, 1, ATTN_NORM, 0);
}

void hover_search(edict_t *self)
{
    if (random() < 0.5f)
        gi.sound(self, CHAN_VOICE, sound_search1, 1, ATTN_NORM, 0);
    else
        gi.sound(self, CHAN_VOICE, sound_search2, 1, ATTN_NORM, 0);
}

void hover_run(edict_t *self);
void hover_stand(edict_t *self);
void hover_dead(edict_t *self);
void hover_attack(edict_t *self);
void hover_reattack(edict_t *self);
void hover_fire_blaster(edict_t *self);
void hover_die(edict_t *self, edict_t *inflictor, edict_t *attacker, int damage, vec3_t point);

static const mframe_t hover_frames_stand[] = {
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL },
    { ai_stand, 0, NULL }
};
const mmove_t hover_move_stand = {FRAME_stand01, FRAME_stand30, hover_frames_stand, NULL};

static const mframe_t hover_frames_stop1[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_stop1 = {FRAME_stop101, FRAME_stop109, hover_frames_stop1, NULL};

static const mframe_t hover_frames_stop2[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_stop2 = {FRAME_stop201, FRAME_stop208, hover_frames_stop2, NULL};

static const mframe_t hover_frames_takeoff[] = {
    { ai_move,    0,  NULL },
    { ai_move,    -2, NULL },
    { ai_move,    5,  NULL },
    { ai_move,    -1, NULL },
    { ai_move,    1,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    -1, NULL },
    { ai_move,    -1, NULL },
    { ai_move,    -1, NULL },
    { ai_move,    0,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    1,  NULL },
    { ai_move,    1,  NULL },
    { ai_move,    -6, NULL },
    { ai_move,    -9, NULL },
    { ai_move,    1,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    1,  NULL },
    { ai_move,    1,  NULL },
    { ai_move,    1,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    3,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_takeoff = {FRAME_takeof01, FRAME_takeof30, hover_frames_takeoff, NULL};

static const mframe_t hover_frames_pain3[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_pain3 = {FRAME_pain301, FRAME_pain309, hover_frames_pain3, hover_run};

static const mframe_t hover_frames_pain2[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_pain2 = {FRAME_pain201, FRAME_pain212, hover_frames_pain2, hover_run};

static const mframe_t hover_frames_pain1[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    -8, NULL },
    { ai_move,    -4, NULL },
    { ai_move,    -6, NULL },
    { ai_move,    -4, NULL },
    { ai_move,    -3, NULL },
    { ai_move,    1,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    3,  NULL },
    { ai_move,    1,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    3,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    7,  NULL },
    { ai_move,    1,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    2,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    5,  NULL },
    { ai_move,    3,  NULL },
    { ai_move,    4,  NULL }
};
const mmove_t hover_move_pain1 = {FRAME_pain101, FRAME_pain128, hover_frames_pain1, hover_run};

static const mframe_t hover_frames_land[] = {
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_land = {FRAME_land01, FRAME_land01, hover_frames_land, NULL};

static const mframe_t hover_frames_forward[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_forward = {FRAME_forwrd01, FRAME_forwrd35, hover_frames_forward, NULL};

static const mframe_t hover_frames_walk[] = {
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL },
    { ai_walk,    4,  NULL }
};
const mmove_t hover_move_walk = {FRAME_forwrd01, FRAME_forwrd35, hover_frames_walk, NULL};

static const mframe_t hover_frames_run[] = {
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL },
    { ai_run, 10, NULL }
};
const mmove_t hover_move_run = {FRAME_forwrd01, FRAME_forwrd35, hover_frames_run, NULL};

static const mframe_t hover_frames_death1[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    -10, NULL },
    { ai_move,    3,  NULL },
    { ai_move,    5,  NULL },
    { ai_move,    4,  NULL },
    { ai_move,    7,  NULL }
};
const mmove_t hover_move_death1 = {FRAME_death101, FRAME_death111, hover_frames_death1, hover_dead};

static const mframe_t hover_frames_backward[] = {
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL },
    { ai_move,    0,  NULL }
};
const mmove_t hover_move_backward = {FRAME_backwd01, FRAME_backwd24, hover_frames_backward, NULL};

static const mframe_t hover_frames_start_attack[] = {
    { ai_charge,  1,  NULL },
    { ai_charge,  1,  NULL },
    { ai_charge,  1,  NULL }
};
const mmove_t hover_move_start_attack = {FRAME_attak101, FRAME_attak103, hover_frames_start_attack, hover_attack};

static const mframe_t hover_frames_attack1[] = {
    { ai_charge,  -10,    hover_fire_blaster },
    { ai_charge,  -10,    hover_fire_blaster },
    { ai_charge,  0,      hover_reattack },
};
const mmove_t hover_move_attack1 = {FRAME_attak104, FRAME_attak106, hover_frames_attack1, NULL};

static const mframe_t hover_frames_end_attack[] = {
    { ai_charge,  1,  NULL },
    { ai_charge,  1,  NULL }
};
const mmove_t hover_move_end_attack = {FRAME_attak107, FRAME_attak108, hover_frames_end_attack, hover_run};

void hover_reattack(edict_t *self)
{
    if (self->enemy->health > 0)
        if (visible(self, self->enemy))
            if (random() <= 0.6f) {
                self->monsterinfo.currentmove = &hover_move_attack1;
                return;
            }
    self->monsterinfo.currentmove = &hover_move_end_attack;
}

void hover_fire_blaster(edict_t *self)
{
    vec3_t  start;
    vec3_t  forward, right;
    vec3_t  end;
    vec3_t  dir;
    int     effect;

    if (self->s.frame == FRAME_attak104)
        effect = EF_HYPERBLASTER;
    else
        effect = 0;

    AngleVectors(self->s.angles, forward, right, NULL);
    G_ProjectSource(self->s.origin, monster_flash_offset[MZ2_HOVER_BLASTER_1], forward, right, start);

    VectorCopy(self->enemy->s.origin, end);
    end[2] += self->enemy->viewheight;
    VectorSubtract(end, start, dir);

    monster_fire_blaster(self, start, dir, 1, 1000, MZ2_HOVER_BLASTER_1, effect);
}

void hover_stand(edict_t *self)
{
    self->monsterinfo.currentmove = &hover_move_stand;
}

void hover_run(edict_t *self)
{
    if (self->monsterinfo.aiflags & AI_STAND_GROUND)
        self->monsterinfo.currentmove = &hover_move_stand;
    else
        self->monsterinfo.currentmove = &hover_move_run;
}

void hover_walk(edict_t *self)
{
    self->monsterinfo.currentmove = &hover_move_walk;
}

void hover_start_attack(edict_t *self)
{
    self->monsterinfo.currentmove = &hover_move_start_attack;
}

void hover_attack(edict_t *self)
{
    self->monsterinfo.currentmove = &hover_move_attack1;
}

void hover_pain(edict_t *self, edict_t *other, float kick, int damage)
{
    if (self->health < (self->max_health / 2))
        self->s.skinnum = 1;

    if (level.framenum < self->pain_debounce_framenum)
        return;

    self->pain_debounce_framenum = level.framenum + 3 * BASE_FRAMERATE;

    if (skill->value == 3)
        return;     // no pain anims in nightmare

    if (damage <= 25) {
        if (random() < 0.5f) {
            gi.sound(self, CHAN_VOICE, sound_pain1, 1, ATTN_NORM, 0);
            self->monsterinfo.currentmove = &hover_move_pain3;
        } else {
            gi.sound(self, CHAN_VOICE, sound_pain2, 1, ATTN_NORM, 0);
            self->monsterinfo.currentmove = &hover_move_pain2;
        }
    } else {
        gi.sound(self, CHAN_VOICE, sound_pain1, 1, ATTN_NORM, 0);
        self->monsterinfo.currentmove = &hover_move_pain1;
    }
}

void hover_deadthink(edict_t *self)
{
    if (!self->groundentity && level.framenum < self->timestamp) {
        self->nextthink = level.framenum + 1;
        return;
    }
    BecomeExplosion1(self);
}

void hover_dead(edict_t *self)
{
    VectorSet(self->mins, -16, -16, -24);
    VectorSet(self->maxs, 16, 16, -8);
    self->movetype = MOVETYPE_TOSS;
    self->think = hover_deadthink;
    self->nextthink = level.framenum + 1;
    self->timestamp = level.framenum + 15 * BASE_FRAMERATE;
    gi.linkentity(self);
}

void hover_die(edict_t *self, edict_t *inflictor, edict_t *attacker, int damage, vec3_t point)
{
    int     n;

// check for gib
    if (self->health <= self->gib_health) {
        gi.sound(self, CHAN_VOICE, gi.soundindex("misc/udeath.wav"), 1, ATTN_NORM, 0);
        for (n = 0; n < 2; n++)
            ThrowGib(self, "models/objects/gibs/bone/tris.md2", damage, GIB_ORGANIC);
        for (n = 0; n < 2; n++)
            ThrowGib(self, "models/objects/gibs/sm_meat/tris.md2", damage, GIB_ORGANIC);
        ThrowHead(self, "models/objects/gibs/sm_meat/tris.md2", damage, GIB_ORGANIC);
        self->deadflag = DEAD_DEAD;
        return;
    }

    if (self->deadflag == DEAD_DEAD)
        return;

// regular death
    if (random() < 0.5f)
        gi.sound(self, CHAN_VOICE, sound_death1, 1, ATTN_NORM, 0);
    else
        gi.sound(self, CHAN_VOICE, sound_death2, 1, ATTN_NORM, 0);
    self->deadflag = DEAD_DEAD;
    self->takedamage = DAMAGE_YES;
    self->monsterinfo.currentmove = &hover_move_death1;
}

/*QUAKED monster_hover (1 .5 0) (-16 -16 -24) (16 16 32) Ambush Trigger_Spawn Sight
*/
void SP_monster_hover(edict_t *self)
{
    if (deathmatch->value) {
        G_FreeEdict(self);
        return;
    }

    sound_pain1 = gi.soundindex("hover/hovpain1.wav");
    sound_pain2 = gi.soundindex("hover/hovpain2.wav");
    sound_death1 = gi.soundindex("hover/hovdeth1.wav");
    sound_death2 = gi.soundindex("hover/hovdeth2.wav");
    sound_sight = gi.soundindex("hover/hovsght1.wav");
    sound_search1 = gi.soundindex("hover/hovsrch1.wav");
    sound_search2 = gi.soundindex("hover/hovsrch2.wav");

    gi.soundindex("hover/hovatck1.wav");

    self->s.sound = gi.soundindex("hover/hovidle1.wav");

    self->movetype = MOVETYPE_STEP;
    self->solid = SOLID_BBOX;
    self->s.modelindex = gi.modelindex("models/monsters/hover/tris.md2");
    VectorSet(self->mins, -24, -24, -24);
    VectorSet(self->maxs, 24, 24, 32);

    self->health = 240;
    self->gib_health = -100;
    self->mass = 150;

    self->pain = hover_pain;
    self->die = hover_die;

    self->monsterinfo.stand = hover_stand;
    self->monsterinfo.walk = hover_walk;
    self->monsterinfo.run = hover_run;
//  self->monsterinfo.dodge = hover_dodge;
    self->monsterinfo.attack = hover_start_attack;
    self->monsterinfo.sight = hover_sight;
    self->monsterinfo.search = hover_search;

    gi.linkentity(self);

    self->monsterinfo.currentmove = &hover_move_stand;
    self->monsterinfo.scale = MODEL_SCALE;

    flymonster_start(self);
}
